*{
    margin: 0;
    padding:0;
}
a,input,li,i,p{
    text-decoration: none;
    border: 0;
    list-style: none;
    font-style: normal;
    outline:none;
    margin: 0;
}
#container{
    width: 100%;
}
#top{
    width: 100%;
}
.top{
    width: 100%;
}
#top .img{
    width: 100%;
}
#top .img-bg{
    width: 100%;
    background:url(../images/case_study/4_01.jpg) no-repeat;
    background-size:100% auto;
}
@media screen and (max-width: 1920px) {
    #top .img-bg{
        height: 600px;
    }
}
@media screen and (max-width: 1600px) {
    #top .img-bg {
        height: 500px;

    }
}
.case{
    width: 1280px;
    background-color: #ffffff;
    margin: 0 auto;
    margin-top: -150px;
    z-index: 11;
    padding-bottom: 100px;
}

.case .nav{
    width: 750px;
    margin: 0 auto;
    padding-bottom: 70px;
}
.case .nav span{
    display: inline-block;
    width: 140px;
    font-size: 16px;
    font-family: 微软雅黑;
    color: #000000;
    height: 45px;
    line-height: 45px;
    text-align:center;
}
.case .nav span:nth-child(1){
    border-radius: 20px;
    border:3px solid #e92b3b;
    color: #e92b3b;
    margin-top: 80px;
}
.case .nav span:nth-child(5){
    margin-right: 0;
}
.case .middle{
    width: 1180px;
    margin:0 auto;
}
.case .content{
    width: 100%;
    overflow: hidden;
}

.case .content .single{
    float: left;
    width: 360px;
    height: 430px;
    margin-right: 40px;
    margin-bottom: 70px;
    position: relative;
}
.case .content .single img{
    width: 100%;
    height: 100%;
}
.case .content .single:nth-child(3){
    margin-right: 0;
}
.case .content .single:nth-child(6){
    margin-right: 0;
}
.case .content .single:nth-child(9){
    margin-right: 0;
}
.case .content .single span{
    position: absolute;
    height: 45px;
    line-height: 45px;
    text-align: center;
    background-color: red;
    padding:0 10px;
    bottom: 0px;
    left: 0;
    opacity: 0.8;
    font-family: 微软雅黑;
    font-size:18px;
    color: #ffffff;
    font-weight: 700;
}
.case .content .single .text{
    position: absolute;
    background-color: #000;
    width: 100%;
    height:430px;
    top: 25px;
    left: 25px;
    opacity: 0.8;
    display: none;

}
.case .content .single .text_mg{
    height: 370px;
    margin: 30px 30px 40px 30px;
    position: relative;
}
.case .content .single .text_mg p:nth-child(1){
    width: 35px;
    height: 2px;
    background-color: #ffffff;
    margin-bottom: 20px;
}
.case .content .single .text_mg p:nth-child(2){
    font-family: 微软雅黑;
    font-size:24px;
    color: #ffffff;
}
.case .content .single .text_mg a{
    width: 50px;
    height: 50px;
    display: inline-block;
    background: url("../images/case_study/链接1.png");
    background-size: 50px 50px;
    position: absolute;
    bottom: 0px;
    right: 0;
}

.load_more{
    width: 120px;
    height: 120px;
    margin: 0 auto;
    border-radius: 50%;
    border: 3px solid #de5863;
    text-align: center;
    position: relative;
    cursor: pointer;
}
.load_more p{
    width: 60px;
    height: 120px;
    line-height: 24px;
    font-family: 微软雅黑;
    font-size: 18px;
    font-weight: 700;
    border-radius: 50%;
    position: absolute;
    top: 37px;
    left: 30px;
    /*margin: 33px 27px;*/
}
footer{
    width: 100%;
    position:  relative;
    bottom: 0;
    left: 0;
}
footer .foot {
    width: 80%;
    padding:20px 10% 10px;
    background-color: #d73240;
}